# Material Flags

Material `$flags` and `$flags2` parameters control how the material is rendered. `$flag` can be changed in real-time to allow changes in rendering, but `$flags2` is read-only and assists the engine or other code in using the material correctly. Enumerations found in <https://github.com/ValveSoftware/source-sdk-2013/blob/master/mp/src/public/materialsystem/imaterial.h>

The flags can also be set via the .vmt Example:

```
#Sets the MATERIAL_VAR_VERTEXCOLOR and MATERIAL_VAR_VERTEXALPHA flag
UnlitGeneric
{
$basetexture brick/brickwall003a
$vertexcolor 1
$vertexalpha 1
}
```

### $flags

$flags can contain the following flags:

| **Flag**                                 | **Value**  | **Comment**                                                           |
| ---------------------------------------- | ---------- | --------------------------------------------------------------------- |
| MATERIAL\_VAR\_DEBUG                     | 1          |                                                                       |
| MATERIAL\_VAR\_NO\_DEBUG\_OVERRIDE       | 2          |                                                                       |
| MATERIAL\_VAR\_NO\_DRAW                  | 4          |                                                                       |
| MATERIAL\_VAR\_USE\_IN\_FILLRATE\_MODE   | 8          |                                                                       |
| MATERIAL\_VAR\_VERTEXCOLOR               | 16         | [$vertexalpha](https://developer.valvesoftware.com/wiki/$vertexalpha) |
| MATERIAL\_VAR\_VERTEXALPHA               | 32         | [$vertexalpha](https://developer.valvesoftware.com/wiki/$vertexalpha) |
| MATERIAL\_VAR\_SELFILLUM                 | 64         | [$selfillum](https://developer.valvesoftware.com/wiki/$selfillum)     |
| MATERIAL\_VAR\_ADDITIVE                  | 128        |                                                                       |
| MATERIAL\_VAR\_ALPHATEST                 | 256        | [$alphatest](https://developer.valvesoftware.com/wiki/$alphatest)     |
| MATERIAL\_VAR\_MULTIPASS                 | 512        |                                                                       |
| MATERIAL\_VAR\_ZNEARER                   | 1024       |                                                                       |
| MATERIAL\_VAR\_MODEL                     | 2048       | [$model](https://developer.valvesoftware.com/wiki/$model)             |
| MATERIAL\_VAR\_FLAT                      | 4096       |                                                                       |
| MATERIAL\_VAR\_NOCULL                    | 8192       | [$nocull](https://developer.valvesoftware.com/wiki/$nocull)           |
| MATERIAL\_VAR\_NOFOG                     | 16384      | [$nofog](https://developer.valvesoftware.com/wiki/$nofog)             |
| MATERIAL\_VAR\_IGNOREZ                   | 32768      | [$ignorez](https://developer.valvesoftware.com/wiki/$ignorez)         |
| MATERIAL\_VAR\_DECAL                     | 65536      |                                                                       |
| MATERIAL\_VAR\_ENVMAPSPHERE              | 131072     |                                                                       |
| MATERIAL\_VAR\_NOALPHAMOD                | 262144     |                                                                       |
| MATERIAL\_VAR\_ENVMAPCAMERASPACE         | 524288     |                                                                       |
| MATERIAL\_VAR\_BASEALPHAENVMAPMASK       | 1048576    |                                                                       |
| MATERIAL\_VAR\_TRANSLUCENT               | 2097152    | [$translucent](https://developer.valvesoftware.com/wiki/$translucent) |
| MATERIAL\_VAR\_NORMALMAPALPHAENVMAPMASK  | 4194304    |                                                                       |
| MATERIAL\_VAR\_NEEDS\_SOFTWARE\_SKINNING | 8388608    |                                                                       |
| MATERIAL\_VAR\_OPAQUETEXTURE             | 16777216   |                                                                       |
| MATERIAL\_VAR\_ENVMAPMODE                | 33554432   |                                                                       |
| MATERIAL\_VAR\_SUPPRESS\_DECALS          | 67108864   |                                                                       |
| MATERIAL\_VAR\_HALFLAMBERT               | 134217728  | [Half Lambert](https://developer.valvesoftware.com/wiki/Half_Lambert) |
| MATERIAL\_VAR\_WIREFRAME                 | 268435456  |                                                                       |
| MATERIAL\_VAR\_ALLOWALPHATOCOVERAGE      | 536870912  |                                                                       |
| MATERIAL\_VAR\_IGNORE\_ALPHA\_MODULATION | 1073741824 |                                                                       |

### $flags2

$flags2 can contain the following flags:

| **Flag**                                                      | **Value** | **Comment**    |
| ------------------------------------------------------------- | --------- | -------------- |
| MATERIAL\_VAR2\_LIGHTING\_UNLIT                               | 0         |                |
| MATERIAL\_VAR2\_LIGHTING\_VERTEX\_LIT                         | 1         |                |
| MATERIAL\_VAR2\_LIGHTING\_LIGHTMAP0                           | 2         |                |
| MATERIAL\_VAR2\_LIGHTING\_BUMPED\_LIGHTMAP                    | 4         |                |
| MATERIAL\_VAR2\_LIGHTING\_MASK                                | 7         | Sum of 3 above |
| MATERIAL\_VAR2\_DIFFUSE\_BUMPMAPPED\_MODEL                    | 8         |                |
| MATERIAL\_VAR2\_USES\_ENV\_CUBEMAP                            | 16        |                |
| MATERIAL\_VAR2\_NEEDS\_TANGENT\_SPACES                        | 32        |                |
| MATERIAL\_VAR2\_NEEDS\_SOFTWARE\_LIGHTING                     | 64        |                |
| MATERIAL\_VAR2\_BLEND\_WITH\_LIGHTMAP\_ALPHA                  | 128       |                |
| MATERIAL\_VAR2\_NEEDS\_BAKED\_LIGHTING\_SNAPSHOTS             | 256       |                |
| MATERIAL\_VAR2\_USE\_FLASHLIGHT                               | 512       |                |
| MATERIAL\_VAR2\_USE\_FIXED\_FUNCTION\_BAKED\_LIGHTING         | 1024      |                |
| MATERIAL\_VAR2\_NEEDS\_FIXED\_FUNCTION\_FLASHLIGHT            | 2048      |                |
| MATERIAL\_VAR2\_USE\_EDITOR                                   | 4096      |                |
| MATERIAL\_VAR2\_NEEDS\_POWER\_OF\_TWO\_FRAME\_BUFFER\_TEXTURE | 8192      |                |
| MATERIAL\_VAR2\_NEEDS\_FULL\_FRAME\_BUFFER\_TEXTURE           | 16384     |                |
| MATERIAL\_VAR2\_IS\_SPRITECARD                                | 32768     |                |
| MATERIAL\_VAR2\_USES\_VERTEXID                                | 65536     |                |
| MATERIAL\_VAR2\_SUPPORTS\_HW\_SKINNING                        | 131072    |                |
| MATERIAL\_VAR2\_SUPPORTS\_FLASHLIGHT                          | 262144    |                |

{% hint style="info" %}
Source: <https://developer.valvesoftware.com/wiki/Material_Flags>
{% endhint %}